#loginBox {
  width: 400px;
  height: 400px;
  margin: auto;
  position: absolute;
  top: 25%;
  left: 40%;
}
#loginBox #headPic {
  width: 200px;
  height: 200px;
  border: 1px solid red;
  border-radius: 50%;
  overflow: hidden;
  margin: auto;
  margin-bottom: 20px;
  transition: all linear 0.2s;
}
#loginBox #headPic img {
  width: 100%;
  height: 100%;
}
#loginBox #sj {
  opacity: 0;
  width: 0;
  height: 0;
  border-left: 10px solid transparent;
  border-right: 10px solid transparent;
  border-bottom: 20px solid rgba(200, 200, 200, 0.4);
  margin: auto;
  transition: all linear 0.2s;
}
#loginBox #formBox {
  opacity: 0;
  width: 400px;
  height: 400px;
  background-color: rgba(200, 200, 200, 0.4);
  margin: auto;
  border-radius: 20px;
  padding: 40px;
  transition: all linear 0.2s;
}
#loginBox:hover #headPic {
  width: 100px;
  height: 100px;
}
#loginBox:hover #sj,
#loginBox:hover #formBox {
  opacity: 1;
}
.content {
  position: relative;
  width: 100%;
  height: 100%;
  background-color: #fff;
  background: url(../../assets/bg.png);
  background-repeat: no-repeat;
  background-size: cover;
}
